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Ceiling Duct Type
Air Conditioner
SERVICE MANUAL
MODELS: LB-D1861HL/CL, LB-D1863HL/CL
LB-D2461HL/CL, LB-D2463HL/CL
LB-F3061HL, LB-F3063HL
LB-F3661HL/CL, LB-F3663HL/CL
LB-F3681HL/CL, LB-F3683HL/CL
LB-F4261HL, LB-F4263HL
LB-E4881HL/CL, LB-E4883HL/CL
LB-E6081HL/CL, LB-E6083HL/CL
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Table of Contents
Troubleshooting
Related Manuals for LG LB-D1861HL
Summary of Contents for LG LB-D1861HL
- Page 1 Ceiling Duct Type Air Conditioner SERVICE MANUAL MODELS: LB-D1861HL/CL, LB-D1863HL/CL LB-D2461HL/CL, LB-D2463HL/CL LB-F3061HL, LB-F3063HL LB-F3661HL/CL, LB-F3663HL/CL LB-F3681HL/CL, LB-F3683HL/CL LB-F4261HL, LB-F4263HL LB-E4881HL/CL, LB-E4883HL/CL LB-E6081HL/CL, LB-E6083HL/CL...
- Page 2 Contents Functions ..........................3 Product Specifications (Cooling & Heating) ................5 Dimensions ..........................9 Refrigeration Cycle Diagram ....................11 Wiring Diagram ........................13 Operation Details ........................19 Installation of Indoor, Outdoor Unit ..................22 Cycle ............................36 Cycle Troubleshooting Guide ....................39 Electronic Parts Troubleshooting Guide ................40 Electronic Control Device .....................43 Exploded View and Replacement Parts List ...............44 –2–...
- Page 3 Functions Indoor Unit Operation ON/OFF by Remote controller Sensing the Room Temperature • Room temperature sensor. (Thermistor) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. • Indoor fan is delayed for 5 seconds at the starting. Starting Current Control Time Delay Safety Control •...
- Page 4 Remote Controller Operation ON/OFF Operation Mode Selection Cooling Operation Mode ( Soft Dry Operation Mode ( Heating Operation Mode ( Auto Operation Mode ( (Cooling (Heating model only) model only) Fan Speed Selection AUTO (Low) (Med) (High) Room Temperature Display : High:39°C ↔...
- Page 5 Product Specifications (Cooling & Heating) Item Unit LB-D1861CL/D1863CL LB-D1861HL/D1863HL LB-D2461CL/D2463CL LB-D2461HL/D2463HL Cooling Capacity kcal/h(W) 4,536/5,274 4,536/5,274 6,048/7,032 6,048/7,032 18,000 18,000 24,000 24,000 BTU/h Heating Capacity kcal/h(W) 4,536/5,274 6,048/7,032 BTU/h 18,000 24,000 2,050/- 1,950/1,900 2,800/- 2,600/2,500 Input Cooling/Heating Running Current Cooling/Heating 9.5/-...
- Page 6 Item Unit LB-F3061HL/F3063HL LB-F3661CL/F3663CL LB-F3661HL/F3663HL LB-F3681CL/F3683CL Cooling Capacity kcal/h(W) 7,560/8,790 9,072/10,548 9,072/10,548 9,072/10,548 30,000 36,000 36,000 36,000 BTU/h Heating Capacity kcal/h(W) 7,560/8,790 9,072/10,548 BTU/h 30,000 36,000 3,000/2,500 4,400/- 4,400/3,600 4,000/- Input Cooling/Heating Running Current Cooling/Heating 14/12 20/- 20/20 Starting Current Cooling/Heating 110/110 125/-...
- Page 7 Item Unit LB-F3681HL/F3683HL LB-F4261HL/F4263HL Cooling Capacity kcal/h(W) 9,072/10,548 10,584/12,306 BTU/h 36000 42000 Heating Capacity kcal/h(W) 9,072/10,548 10,584/12,306 BTU/h 36000 42000 4,000/3,400 4,800/4,600 Input Cooling/Heating Running Current Cooling/Heating 24/23 Starting Current Cooling/Heating 45/45 125/125 E.E.R Cooling kcal/hW(W/W) 2.39(2.78) 2.32(2.70) BTU/hW C.O.P Heating kcal/hW(W/W) 2.84(3.3)
- Page 8 Item Unit LB-E4881CL/E4883CL LB-E4881HL/E4883HL LB-E6081CL/E6083CL LB-E6081HL/E6083HL Cooling Capacity kcal/h(W) 12,096/14,064 12,096/14,064 15,120/17,580 15,120/17,580 BTU/h 48,000 48,000 60,000 60,000 Heating Capacity kcal/h(W) 12,096/14,064 15,120/17,580 BTU/h 48,000 60,000 Input Cooling/Heating 6,000/- 5,500/4,500 6,000/- 6,150/4,900 Running Current Cooling/Heating 9.5/- 10/- 10.5/8.5 Starting Current Cooling/Heating 125/- 125/125...
- Page 9 Dimensions (1) Indoor Unit MODEL W(mm) 1180 1180 1180 1230 1230 H(mm) D(mm) –9–...
- Page 10 (2) Outdoor Unit (18K/24K/30K) (36K/42K/48K/60K) MODEL W(mm) H(mm) 1,220 1,220 1,220 D(mm) –10–...
- Page 11 Refrigeration Cycle Diagram • HEAT PUMP (LB-D1861HL/LB-D1863HL/LB-D2461HL/LB-D2463HL/LB-F3061HL/LB-F3063HL/ LB-F3661HL/LB-F3663HL/LB-F3681HL/LB-F3683HL/LB-F4261HL/LB-F4263HL/ LB-E4881HL/LB-E4883HL/LB-E6081HL/LB-E6083HL) INDOOR UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE HEAT HEAT EXCHANGER EXCHANGER GAS SIDE REVERSING VALVE COOLING COMPRESSOR HEATING *Additional Pipe size(Diameter: ø) Piping length(m) Elevation(m) refrigerant MODEL Liquid Rated Max.
- Page 12 • COOLING ONLY (LB-D1861CL/LB-D1863CL/LB-D2461CL/LB-D2463CL/LB-F3661CL/ LB-D3663CL/LB-F3681CL/LB-F3683CL/LB-E4881CL/LB-E4883CL/ LB-E6081CL/LB-E6083CL) INDOOR UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE HEAT HEAT EXCHANGER EXCHANGER (CONDENSER) (CONDENSER) COMPRESSOR GAS SIDE *Additional Pipe size(Diameter: ø) Piping length(m) Elevation(m) refrigerant MODEL Liquid Rated Max. Rated Max. (g/m) 5/8" 1/4" 5/8"...
- Page 13 Wiring Diagram HEAT PUMP Model : LB-D1861HL/LB-D1863HL/LB-D2461HL/LB-D2463HL OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM CAPACITOR INDOOR DRAIN MOTOR PUMP COMP MOTOR FUSE 250V10A POWER RELAY REVERSING VALVE PIPE GN/YL THERMISTOR FLOAT S/W REMOTE CONTROL TERMINAL TERMINAL BLOCK ZONE BLOCK OPTION POWER...
- Page 14 HEAT PUMP Model : LB-F3061HL/LB-F3063HL OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM CAPACITOR CAPACITOR INDOOR DRAIN COMP MOTOR PUMP MOTOR FUSE REVERSING 250V10A POWER VALVE RELAY PIPE L3 L2 L1 GN/YL THERMISTOR SUMP HEATER FLOAT S/W TERMINAL BLOCK REMOTE CONTROL TERMINAL TERMINAL BLOCK BLOCK...
- Page 15 HEAT PUMP Model : LB-F3661HL/LB-F3663HL OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM C TH INDOOR DRAIN MOTOR PUMP T/B1 52F1 FUSE GN/YL 250V10A 63H2 PIPE THERMISTOR 220-240V 1Ø, 50Hz POWER SUPPLY FLOAT S/W REMOTE PTCR CONTROL TERMINAL BLOCK OPTIONAL ZONE CONTROL EXTRA 20SV GN/YL...
- Page 16 HEAT PUMP Model : LB-F3681HL/LB-F3683HL OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM C TH INDOOR DRAIN MOTOR PUMP T/B1 52F1 2 3 4 GN/YL FUSE R S T N 63H2 250V10A PIPE 380-415V THERMISTOR 3Ø, 50Hz POWER SUPPLY FLOAT S/W REMOTE CONTROL TERMINAL BLOCK...
- Page 17 HEAT PUMP Model : LB-F4261HL/LB-F4263HL OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM C TH INDOOR DRAIN 52F1 MOTOR PUMP T/B1 GN/YL FUSE 250V10A 220-240V T/B2 1ø,50Hz 63H2 POWER SUPPLY PIPE THERMISTOR YL YL FLOAT S/W BK YL PTCR REMOTE CONTROL 49FMo 49FMo TERMINAL 20SV...
- Page 18 HEAT PUMP Model : LB-E4881HL/LB-E4883HL/LB-E6081HL/LB-E6083HL OUTDOOR WIRING DIAGRAM INDOOR WIRING DIAGRAM Fuse (250V 5A) C TH Deice PCB HIGH PRESSURE S/W INDOOR DRAIN Fuse MOTOR PUMP (250V 5A) POWER RELAY TERMINAL FUSE S T N BLOCK 250V10A POWER T/B1 RELAY POWER SUPPLY T/B2 PIPE...
- Page 19 Operation Details (1) The function of main control 1. Time Delay safety Control • 3min ... The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle. (Protection of compressor) • 30sec ... The 4-way valve is ceased for 30sec. to prevent the refrigerant-gas abnormal noise when the Heating operation is OFF or switched to the other operation mode while compress is off.
- Page 20 4. Heating Mode Operation (Except Cooling Model) The unit will operate according to the setting by the remote controller and the operation diagram is shown as following. Intake Air temp. minimum 3min Setting temp.+3°C (Compressor OFF) Setting temp. (Compressor ON) minimum minimum 1min...
- Page 21 6. Defrost Control(30K/36K/42K/48K/60K) • Defrost control is availavle 45 minutes later since heating mode operation started, and it will not prolong over 10 minutes. • Defrost control is carried out when the outdoor pipe temp. falls below -6°C for more than 3 minutes after 45 minutes passed from starting of heating operation.
- Page 22 Installation of Indoor, Outdoor Unit 1. Selection of the best location Top view Inspection hole (unit: mm) (600X600) 1) Indoor unit Select location Control box Install the air conditioner in the location that satis- fies the following conditions. • The place shall easily bear a load exceeding four times the indoor unit’s weight.
- Page 23 2. Ceiling dimension and hanging bolt location Installation of Unit Install the unit above the ceiling correctly. CASE 1 POSITION OF SUSPENSION BOLT • Apply a joint-canvas between the unit and duct to absorb unnecessary vibration. • Apply a filter Accessory at air return hole. (Unit:mm) Dimension F (G)
- Page 24 3. The Indoor Unit Installation • Select and mark the position for fixing bolts. • Drill the hole for set anchor on the face of ceiling. Old building New building • Insert the set anchor and washer onto the suspen- sion bolts for locking the suspension bolts on the ceil- ing.
- Page 25 WIRED REMOTE CONTROL INSTALLATION DISASSEMBLING Front case • Separate the under plate from Remote control box. Lever carefully Remote control the box open box body using a screw • Fix the cord clamps on the wall by ø 3 tapping driver, etc.
- Page 26 5. Connecting Cables between Indoor Unit and Outdoor Unit 1) Connecting cables to the Indoor Unit Connect the wires to the terminals on the control board individually according to the outdoor unit connection. • Ensure that the color of the wires of outdoor unit and the terminal No. are the same as those of indoor unit respectively (380-415V3N~) (220-240V~)
- Page 27 Perform the electrical wiring work according to the electrical ELECTRICAL WIRING wiring connection. • All wiring must comply with local requirements. Circuit Breaker • Select a power source that is capable of supply- Main ing the current required by the air conditioner. power source Switch box •...
- Page 28 6. Connecting Pipes to the Indoor Unit • Preparation of Piping Main cause of gas leakage is defect in flaring work. Carry out correct flaring work in the following procedure. 1) Cut the pipes and the cable. Use the accessory piping kit or the pipes purchased locally.
- Page 29 Piping Connection 1. Form the piping according to its routing. Avoid bend- ing and bending back the same piping point more Liquid side than three times. (This will result in hardening the pipe.) Indoor 2. After deforming the piping, align centers of the union unit fitting of the indoor unit and the piping, and tighten Outdoor...
- Page 30 CAUTION 1. Install declination of the indoor unit is very important for the drain of the duct type air conditioner. 2. Minimum thickness of the insulation for the connecting pipe shall be 5mm. Front of view • The unit must be horizontal or declined to the drain hose connected when finished installation. Ceiling CORRECT INCORRECT...
- Page 31 • Drill the piping hole with 70mm dia, hole core drill. WALL Indoor Outdoor • Piping hole should be slightly slant to the outdoor side. 5~7mm INSULATION, OTHERS Insulate the joint and tubes completely. THERMAL INSULATION All thermal insulation must comply with local requirement. INDOOR UNIT Union for liquid pipe Thermal insulator for refrigerant pipe...
- Page 32 FORM THE PIPINGS Seal a small opening around the pipings 1. Wrap the connecting portion of indoor unit with with gum type sealer. the Insulation material and secure it with two Plastic Bands. (for the right pipings) • If you want to connect an additional drain hose, the end of the drain-outlet should keep distance Drain hose from the ground.
- Page 33 2) Connection of power supply 1. Connect the power supply cord to the independent power supply. • Circuit breaker is required. 2. Operate the unit for fifteen minutes or more. 3) Evaluation of the performance 1. Measure the temperature of the intake and discharge air. 2.
- Page 34 Optional Operation 1) Two Thermistor System (1) Open the rear cover of the wired remote-controller to set the mode. (2) Select one of three selectable modes as follows. • Position 1: The room temperature is controlled by the thermistor of the main body. •...
- Page 35 2) Group Control(Optional Wiring) • You can use a group control operation after connecting the brown and yellow wire of each air-conditioner. • Remove the resistor "OP 7" in remote controller. • It operates maximum 16 Units by only one Wired Remote Controller, and each Unit starts sequentially to prevent overcurrent.
- Page 36 Cycle 1. Installation (Connecting the piping between indoor and outdoor unit) Liquid side Indoor unit Outdoor unit Gas side Gas cylinder Purge the air • Installation (1) Connect the piping between the indoor and (5) If there is no leakage, discharge R22 in piping outdoor unit firmly.
- Page 37 2. Disconnection (on moving) Liquid side Indoor unit Outdoor unit Gas side Retrieving Tank • Disconnection (1) Attach the charging hose (manifold gage) to (6) Disconnect the piping between indoor and the service port. outdoor unit and then put on service cap to –...
- Page 38 3. Gas Charging (After Evacuation) Liquid side Indoor unit Open Outdoor unit 2-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE • Procedure This is different from previous procedures. (1) Connect the charge hose to the charging Because you are charging with liquid refrigerant cylinder.
- Page 39 Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. difference : approx. 0°C All amount of refrigerant leaked out Current : less than 80% of Check refrigeration cycle rated current Temp. Difference Refrigerant leakege Temp.
- Page 40 Electronic Parts Troubleshooting Guide Possible Trouble 1 : The unit does not operate. Check the FUSE Is the input voltage and the wiring diagram. of transformer AC230V? Is the input voltage Check the main P.C.B of IC03D about AC12V? pattern. Is the output voltage Exchange IC03D.
- Page 41 Possible Trouble 2 : The indoor fan does not operate. Is it the HOT It is normal operation. START mode? Is IC01M operated Exchange IC01M. normally? Is the each Relay Exchange Relay. any problem? Check the fan motor and connector.(CN-MOTOR) Possible Trouble 3 : Ineffective Heating Adjust operation mode.
- Page 42 Possible Trouble 4 : Wired remote controller does not operate. Check the parts of Is the LCD operated communication. normally? Connector CN-Remo, and Is the terminal of wired terminals of wired Remocon T2 DC12V? Remocon exactly. Check the wired Remocon Is the pin 39, 40 of PCB and DC 12V pattern.
- Page 43 Electronic control device MAIN P.C.B ASM –43–...
- Page 44 Exploded View and Replacement Parts List 1. Indoor Unit (LB-D1861HL/CL, LB-D1863HL/CL, LB-D2461HL/CL, LB-D2463HL/CL, LB-F3061HL/CL, • Models: LB-F3063HL/CL, LB-F3661HL/CL, LB-F3663HL/CL, LB-F3681HL/CL, LB-F3683HL/CL, LB-F4261HL/CL, LB-F4263HL/CL, LB-E4881HL/CL, LB-E4883HL/CL, LB-E6081HL/CL, LB-E6083HL/CL) –44–...
- Page 45 Parts List • 18K/24K/30K Part No. REMARKS LOCATION No. DESCRIPTION LB-D1861HL LB-D1861CL LB-D2461HL LB-D2461CL LB-F3061HL LB-D1863HL LB-D1863CL LB-D2463HL LB-D2463CL LB-F3063HL 152302 FILTER(MECH), A/C 5230A30001D 5230A30001D 5230A30001D 5230A30001D 5230A30001F 237204-1 PANEL, SIDE 3720A20027Y 3720A20027Y 3720A20027Y 3720A20027Y 3720A20067Y 237204-2 PANEL, SIDE 3720A20028Y 3720A20028Y 3720A20028Y 3720A20028Y 3720A20068Y...
- Page 46 Parts List • 36K Part No. LOCATION NO DESCRIPTION REMARKS LB-F3661HL LB-F3661CL LB-F3681HL LB-F3681CL LB-F3663HL LB-F3663CL LB-F3683HL LB-F3683CL 152302 FILTER(MECH), A/C 5230A30001F 5230A30001F 5230A30001F 5230A30001F 237204-1 PANEL, SIDE 3720A20067Y 3720A20067Y 3720A20067Y 3720A20067Y 237204-2 PANEL, SIDE 3720A20068Y 3720A20068Y 3720A20068Y 3720A20068Y 249951 CONTROL BOX ASSY, INDOOR 4995A20011S 4995A20011T...
- Page 47 Parts List • 42K/48K/60K Part No. REMARKS LOCATION No. DESCRIPTION LB-F4261HL LB-E4881HL LB-E4881CL LB-E6081HL LB-E6081CL LB-F4263HL LB-E4883HL LB-E4883CL LB-E6083HL LB-E6083CL 152302 FILTER(MECH), A/C 5230A30001F 5230A30001A 5230A30001A 5230A30001A 5230A30001A 237204-1 PANEL, SIDE 3720A20067Y 3720A20010X 3720A20010X 3720A20010X 3720A20010X 237204-2 PANEL, SIDE 3720A20068Y 3720A20011X 3720A20011X 3720A20011X 3720A20011X 249951 CONTROL BOX ASSY, INDOOR 4995A20011S 4995A20011S 4995A20011T 4995A20011S 4995A20011T 263230-1...
- Page 48 2. Outdoor Unit • Models: LB-D1861HL/CL, LB-D1863HL/CL, LB-D2461HL/CL, LB-D2463HL/CL, LB-F3061HL, LB-F3063HL –48–...
- Page 49 Parts List • 18K/24K/30K Part No. REMARKS LOCATION No. DESCRIPTION LB-D1861HL LB-D1861CL LB-D2461HL LB-D2461CL LB-F3061HL LB-D1863HL LB-D1863CL LB-D2463HL LB-D2463CL LB-F3063HL 137213-1 PANEL ASSY, SIDE 1A00202C 137213-2 PANEL ASSY, SIDE 1A00204F 263230 THERMISTOR ASSY 3Q35015G 268711 PWB(PCB) ASSY, DEICER 6871A20015R 349480...
- Page 50 2. Outdoor Unit • Models: LB-F3661HL/CL, LB-F3663HL/CL, LB-F3681HL/CL, LB-F3683HL/CL –50–...
- Page 51 Parts List • 36K Part No. LOCATION NO DESCRIPTION REMARKS LB-F3661HL LB-F3661CL LB-F3681HL LB-F3681CL LB-F3663HL LB-F3663CL LB-F3683HL LB-F3683CL 137213 PANEL ASSY, SIDE 3A01055Z 3A01055Z 3A01055Z 3A01055Z 263230 THERMISTOR ASSY 3Q35015H 3Q35015H 268711 PWB(PCB) ASSY, DEICER 6871A20015N 6871A20015U 435301 GRILLE ASSY, DISCHARGE(OUTDOOR) 2A00144Y 2A00144Y 2A00144Y...
- Page 52 2. Outdoor Unit • Models: LB-F4261HL/CL, LB-F4263HL/CL, LB-E4881HL/CL, LB-E4883HL/CL, LB-E6081HL/CL, LB-E6083HL/CL –52–...
- Page 53 Parts List • 42K/48K/60K Part No. REMARKS LOCATION No. DESCRIPTION LB-F4261HL LB-E4881HL LB-E4881CL LB-E6081HL LB-E6081CL LB-F4263HL LB-E4883HL LB-E4883CL LB-E6083HL LB-E6083CL 137213 PANEL ASSY, SIDE 3720AP1215B 3720AP1215B 3720AP1215B 3720AP1215B 3720AP1215B 263230 THERMISTOR ASSY 3Q35015E 3Q35015E 3Q35015E 268711 PWB(PCB) ASSY, DEICER 6871A20015U 6871A20015N 6871A20015N 435301 GRILLE, DISCHARGE...
- Page 54 December, 2000 June, 2001 Printed in Korea P/No.: 3828A30023K Printed in Korea P/No.: 3828A20050B...